:root {
  --bg: #f6f3ea;
  --ink: #1d1f1b;
  --muted: #5d615a;
  --line: #d9d3c2;
  --accent: #c8501d;
  --accent-ink: #ffffff;
  --card: #fffdf7;
  --code: #2b2d29;
  --code-ink: #f3efe3;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #15170f;
    --ink: #ece7d8;
    --muted: #a8ab9c;
    --line: #3a3d33;
    --accent: #f08a4b;
    --accent-ink: #15170f;
    --card: #1e2118;
    --code: #0e100a;
    --code-ink: #e6e1d2;
  }
}
* { box-sizing: border-box; }
html { font-size: 17px; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "Hiragino Sans", "Noto Sans JP", sans-serif;
  line-height: 1.55;
}
main, header, footer { max-width: 44rem; margin: 0 auto; padding: 0 1.25rem; }
.menu {
  max-width: 44rem; margin: 0 auto; padding: 0.8rem 1.25rem 0; display: flex; flex-wrap: wrap;
  gap: 0.1rem 1.1rem; font-size: 0.92rem; border-bottom: 1px solid var(--line);
}
.menu a { color: var(--ink); text-decoration: none; padding: 0.35rem 0 0.45rem; border-bottom: 2px solid transparent; }
.menu a:hover { color: var(--accent); }
.menu a[aria-current="page"] { color: var(--accent); font-weight: 600; border-bottom-color: var(--accent); }
header { padding-top: 1.75rem; display: flex; align-items: center; gap: 1rem; }
header img { width: 72px; height: 72px; flex: none; }
header h1 { margin: 0; font-size: 2rem; letter-spacing: -0.01em; }
header p { margin: 0.15rem 0 0; color: var(--muted); }
.hero { margin: 2rem 0 1.5rem; }
.hero p.lead { font-size: 1.25rem; margin: 0 0 1.25rem; }
.buttons { display: flex; flex-wrap: wrap; gap: 0.75rem; }
.button {
  display: inline-block; padding: 0.7rem 1.1rem; border-radius: 0.5rem;
  border: 1px solid var(--accent); text-decoration: none; font-weight: 600;
  min-height: 44px; line-height: 1.2;
}
.button.primary { background: var(--accent); color: var(--accent-ink); }
.button.secondary { color: var(--accent); }
section { margin: 2.5rem 0; }
h2 { font-size: 1.35rem; margin: 0 0 0.75rem; }
p, li { margin: 0 0 0.75rem; }
a { color: var(--accent); }
.ledger {
  background: var(--card); border: 1px solid var(--line); border-radius: 0.75rem; padding: 1.25rem;
}
.ledger p:last-child { margin-bottom: 0; }
.num { font-variant-numeric: tabular-nums; font-weight: 700; }
table { width: 100%; border-collapse: collapse; font-size: 0.95rem; }
th, td { text-align: left; vertical-align: top; padding: 0.55rem 0.5rem; border-top: 1px solid var(--line); }
th { color: var(--muted); font-weight: 600; }
thead th { border-top: none; }
.wrap { overflow-x: auto; }
pre {
  background: var(--code); color: var(--code-ink); padding: 0.9rem 1rem; border-radius: 0.5rem;
  overflow-x: auto; font-size: 0.9rem; line-height: 1.5; margin: 0 0 0.75rem;
}
code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
p code, li code, td code { background: var(--card); border: 1px solid var(--line); padding: 0.05rem 0.3rem; border-radius: 0.25rem; font-size: 0.9em; }
.tiers { display: grid; gap: 1rem; grid-template-columns: 1fr; }
@media (min-width: 640px) { .tiers { grid-template-columns: repeat(3, 1fr); } }
.tier { background: var(--card); border: 1px solid var(--line); border-radius: 0.75rem; padding: 1rem; }
.tier h3 { margin: 0 0 0.4rem; font-size: 1.05rem; }
.tier p { margin: 0 0 0.5rem; font-size: 0.95rem; }
.tier .price { color: var(--muted); font-size: 0.9rem; }
footer { padding: 2.5rem 1.25rem 3rem; color: var(--muted); font-size: 0.9rem; border-top: 1px solid var(--line); margin-top: 3rem; }
footer p { margin: 0 0 0.4rem; }
.notfound { text-align: center; padding: 4rem 0; }
.notfound h1 { font-size: 3rem; margin: 0 0 0.5rem; }
@media (prefers-reduced-motion: no-preference) { a.button { transition: transform 120ms ease; } a.button:hover { transform: translateY(-1px); } }